Switch-movement.



S. BUCHSBAUM.

SWITCH MOVEMENT.

APPLICATION FILED JULY 21. IsIl.

Patented Mm'. L1, lJlJ.

claimed in my SAMUEL BUCHSBAUM, 0F CHICAGO, ILLINCIS, ASSIGNOR T0 GORDON ELECTRIC AND MANUFACTURING CO., 0F WATERVILLE, CONNECTICUT.

SWITCH-MOVEMENT.

lSpecification of Letters Patent.

Patented Mar. 4L, 1919.

To all whom t may concern.'

Be it known that I, SAMUEL BUCHSBAUM,

a citizen of the UnitedStates, residing at Chicago, in the county of Cook and State of Illinois, have invented a certain new and useful Improyement in Switch-Movements, of which the following is a full, clear concise, and exact description,reference being had 'to the accompanying drawings, forming a part of this specification.

My invention relates to switch movements and is more particularly an improvement over the switch movement' described and prior Patent No. 1,222,355, dated April 10, 1917. v

My invention concerns itself with the simplification of the general style of movement set forth in my said patent. The invention herein disclosed-sets forth a movement which contains but two moving parts exclusive of the linger piece which operates the moving parts. In the preferred form, one of the above parts is spring pressed. 4 j

I will explain this particular form of carrying out my invention more in detail by referring to the accompanying drawing, in which- Figure 1 is a longitudinal sectionalvlew of thedevice constructed in accordance with my invention Fig. 2 is a top view ofthe device;

Fig. 3 is 21.-sectional view 'on line 3 3 of Fig. 1 with the finger pieces removed;

Fig.l 4 is a sectional view on line of Fig. 3;

Fig. 5 is a fragmentary view similar to Fig. 1 showing the movement in its reverse position, and

Fig. 6 is a perspective view of the insulating shell, showmg the two contact terminals mounted in position.

In the embodiment herein shown my switch movement is illustrated as of use for what is commonly called a pendant switch, the switch movement being mounted in a shell consisting of the base plate 1 and cap 2. This switch movement comprisesthe 1nsulating support 3 having a central recess 4 and having two side recesses 5 and `6 within which circuit; controlling springs 7 and 8 L are mounted, the same belng held in place b screws 9, 10, which `screws extend throng the insulating piece 3 and hold the connecting terminal strips 11 and 12. These ter'- nnnal strips carry connecting screws 13 and shell, as clearly apparent .tion by snap action 14. The means for making and breakin 0 rthe circuit between the springs 7 and 8 consist of a circuit changing element 15 mounted at the extremity of a link 16 slidably and loosely carried on an extension 17 of a base piece 18. This extension 17 has the aperture 19 through which the link 16 is movable. A spring 20 normally forces the switch element away from the standard 17 and against the rocking link 21. Said link 21 through the agency of a centrally located aperture 24: is placed upon the stud 25,V which stud forms part of the arm 26. This arm 26 is also part of the base piece 18. The rocking link 21 has the limits of its motion set by lugs 27. 27 forming part of upwardly projecting shelves 28, these shelves likewise being part of the base piece 18. Screws 29 hold the switch structure in position inthe insulating base 3. Finger pieces 30 and 31 united by the stem 32 act upon the lower portion of the rocking link 21 to push it first toward one side and then toward,...

the other. This stem 32 the opening 33 in the link pieces 30 and 31 project projects' through 21. These finger outwardly of the from the illustration. v

The link 21 at its upper xtremity is bifurcated to form wings 23, 23 which are on opposite sides of the stem 32. The lower protruding surfaces of these wings serve as stops for the switch element 15 when in one of its limiting positions (see Fig. 5). The lower extremity of the link 21 has turnedin lugs 22 which serve as steps for the switch element 15 when in its other limiting position.

From the above description will be readily seen that there are but three arts in the entire structure. One of these 1s the link 16 and the other is the rocking link 21, the link 16 at the same time carrying the circuit controlling element 15. The nger pieces merely act on one extremity of the rocking link 21, thereby causing the spring pressed link 16 to change its posifrom one limiting position to the other.

In the particular form shown the spring 20 and link 16 which it controls are made in two parts as illustrated. The base piece 18 is made from a single piece of metal which has supporting means for the movable links and also means to control the limit of momoving tion. The insulating support 3 is likewise made of one piece and to it the switch movement is held by the two screws 29 which need not perform any other function .than that of holding the parts together. As will be apparent fromithe illustration there is ample room for the connecting terminals to which the incoming wires may be attached.

The improved construction of the shell herein is not explained in detail as the same is made the basis for a separate' application for Letters Patent Serial No. 181,966 filed July 21, 1917. I

Having thus described one form which my invention may take it is thought the invention will be clear to those skilled in the art, and what I claim as new and desire to secure by Letters Patent is:

1. In a switch movement of the character described the combination with a base piece, a rocking link pivotally carried by saidbase piece, a second link oscillatingly and shiftably carried by said base piece at one extremity of said second link and havingits other extremity movable along said rocking link, a switch controlling element forming an integral part of said second aforesaid link, manually controlled means for moving said rocking link from one limiting position toward its other limiting position, said rocking link having sidewise extending projections at one end and inwardly bent pro-- jections. at theY other to limit the movement of said second link, and resilient means associated with said second link tending to move said link toward either of its extreme positions.

2. In a. switch movement of the character described thecombination with a base ieee, a rocking link pivotally carried by sai base piece, a second link oscillatingly and ably carried by said base piece at one ex'- tremity of said second link and having its other extremity movable along said rocking link, a switch controlling `element forming an integral part of said second aforesaid link, said switch-element and said second link consisting of a substantially T shaped structure the extremities of whose arms. are bent 'inwardly to form said switch element, manually controlled means for moving said rocking link from one limiting position toward its other limiting position, said rocking .link having sidewise extending projections at one end and inwardly bent projections. at the other to limit the movement of 'said second link, and resilient means associated with said second link tending to move said link toward either of its extreme positions.

In witness whereof, I hereunto subscribe my name this 2nd day of July, A. D., 1917.

SAMUEL BUcHsBanM.

shiftl 

